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    • 1. 发明申请
    • POLYMALIC ACID-BASED MULTIFUNCTIONAL DRUG DELIVERY SYSTEM
    • 基于聚合酸的多功能药物递送系统
    • WO2005055980A3
    • 2006-01-05
    • PCT/US2004040660
    • 2004-12-03
    • ARROGENE INCLJUBIMOVA JULIA YBLACK KEITH LHOLLER EGGEHARD
    • LJUBIMOVA JULIA YBLACK KEITH LHOLLER EGGEHARD
    • A61K47/48
    • A61K47/6883A61K47/593A61K47/60
    • A structured drug system that is useful for delivering a drug payload to a specific tissue or cell type is disclosed. The system is based on purified polymalic acid. This polymer isolated from natural sources is biocompatible, biodegradable and of very low toxicity. The polymer is extremely water soluble and contains a large number of free carboxyl groups which can used to attach a number of different active molecules. In the examples disclosed N-hydroxysuccinimide esters of the carboxyl groups are used to attach such molecules. The active molecules include monoclonal antibodies to promote specific cellular uptake and specific pro-drugs such as antisense nucleic acids designed to modify the cellular metabolism of a target cell. The pro-drugs are advantageously linked by a somewhat labile bond so that they will be released under specific conditions. In addition, the system contains amide-linked valine to encourage membrane disruption under lysosomal conditions. Polyethylene glycol groups are attached to extend the drug system's circulation half-life. In addition, fluorescent reported groups can be readily included to aid in visualizing and confirming drug system targeting. The drug system can deliver treatments for a wide range of diseases and is specially advantageous for treatment of neoplasms.
    • 公开了一种用于将药物有效载荷递送到特定组织或细胞类型的结构化药物系统。 该系统基于纯化的聚丙酸。 从天然来源分离的聚合物是生物相容的,可生物降解的和非常低的毒性。 聚合物极易水溶,并含有大量游离羧基,可用于连接许多不同的活性分子。 在实施例中,羧基的N-羟基琥珀酰亚胺酯用于附着这些分子。 活性分子包括促进特异性细胞摄取的单克隆抗体和特异性前体药物,例如旨在修饰靶细胞的细胞代谢的反义核酸。 前药有利地通过稍微不稳定的键连接,使得它们将在特定条件下释放。 此外,该系统含有酰胺键缬氨酸,以促进溶酶体条件下的膜破坏。 连接聚乙二醇基团以延长药物系统的循环半衰期。 此外,可以容易地包括荧光报告的组以帮助可视化和确认药物系统靶向。 药物系统可以为广泛的疾病提供治疗,特别有利于治疗肿瘤。